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Commercial Roofing

Denver Green Roof

Denver’s Green Roofing Ordinance for Commercial and Multi-Family Roofing

Denver’s Green Roofing Ordinance for Commercial and Multi-Family Roofing If you are thinking about replacing your commercial or multi-family roof in the City of Denver, then here are 5 things you must know to make sure your roof is compliant with Denver’s new Green Building Ordinance! 1. Minimum Requirements: If your building’s total square footage is over 25,000 sf, then the roof replacement request must go through Denver’s Green Building Ordinance review. There are a few exceptions, but for the most part buildings over 25,000 sf will be subject to review. The review for a Green Roofing permit is a much longer process than pulling a traditional roofing permit for a single-family residence and your commercial or multi-family roofing permit could take up to a few weeks or longer for review and approval.  2. “Cool Roof”: One of the main requirements for Denver’s Green Building Ordinance is to install a “cool roof” system.  a. For flat commercial roofs, the roof must meet “cool roof” requirements, such as a highly reflective membrane, appropriate insulation, and air/moisture barrier. The membrane could be TPO (Thermoplastic Polyolefin) or white EPDM (Ethylene Propylene Diene Terpolymer). If you are getting estimates to replace your roofing system, ensure the estimate includes the above requirements for a “cool roof” in Denver.  b. For steep-sloped roofs, be careful as Denver may require the use of “Cool Roof” shingles. If that’s the case, the costs for a “Cool Roof” shingle system are dramatically more expensive than traditional shingles and the lead time to have them delivered to Colorado could be weeks to months. For more information on steep slope “cool roof” systems check out Owens Corning Website: https://www.owenscorning.com/en-us/roofing/shingles/feature/coolcolor 3. Compliance Options: Additionally, on top of the “cool roof” system, Denver may require you to meet one of the following compliance options: a. Green Roofs / Green Space: Very expensive! b. Installing on Site or Purchasing Off-site Solar or other renewable energy: Very Expensive! c. Energy Cost Savings: Cost-Effective! d. Green Building Certifications: Cost-Effective! Check https://energizedenver.org/ to see your building’s ENERGY STAR score.  e. Payment to the Green Building Fund: Very Expensive and a waste of money in my opinion! f. Energy Program: There is...

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